Elemental partitioning-mediated crystalline-to-amorphous phase transformation under quasi-static deformation

• DOI: 10.1038/s41467-024-45513-7
• Publication Date: 2024-02-09T09:02:48Z
• Authors: Ge Wu; Chang Liu; Yong-Qiang Yan; Sida Liu; Xinyu Ma; Shengying Yue; Zhi-Wei Shan
• Keywords: Enthalpy of mixing; Polyamorphism; Hardening (computing)

The transformation induced plasticity phenomenon occurs when one phase transforms to another during plastic deformation, which is usually diffusionless. Here we present elemental partitioning-mediated crystalline-to-amorphous quasi-static in an alloy form of a Cr-Ni-Co (crystalline)/Zr-Ti-Nb-Hf-Ni-Co (amorphous) nanolaminated composite, where the constitute elements two phases have large negative mixing enthalpy. Upon atomic intermixing between adjacent amorphous and crystalline due extensive rearrangement atoms at interfaces. enthalpy among constituent promotes original phase, shows different composition short-range-order structure compared with other phase. reduced size shortens mean-free-path dislocations, facilitating strain hardening. enthalpy-guided design based on opens up avenue for development crystal-glass composite alloys ultrahigh strength plasticity.